Sports center to Baiyun Culture Square

1. 1. Decentralized
e to the use of Distributed Accounting and storage, there is no centralized hardware or management organization, the rights and obligations of any node are equal, and the data blocks in the system are jointly maintained by the nodes with maintenance function in the whole system
2. Openness
the system is open, in addition to the private information of the parties to the transaction is encrypted, the data of the blockchain is open to all, and anyone can query the blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent
3. Autonomy
blockchain adopts consensus based specifications and Protocols (such as a set of open and transparent algorithms) to enable all nodes in the whole system to exchange data freely and safely in a de trusted environment, so that the trust in "people" is changed into the trust in machines, and any human intervention does not work
4. Anonymity
since the exchange between nodes follows a fixed algorithm, their data interaction does not need to be trusted (the program rules in the blockchain will judge whether the activity is effective by themselves), so the counterparties do not need to let the counterparties generate their own trust by disclosing their identities, which is very helpful for credit accumulation
outstanding advantages:
information can not be tampered with
once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% of the nodes in the system can be controlled at the same time, the modification of the database on a single node is invalid, so the data stability and reliability of the blockchain are very high<
extended information:
blockchain originated from bitcoin, two weeks after the collapse of Lehman Brothers, which marked the starting point of the last round of financial crisis. On November 1, 2008, a person who called himself Satoshi Nakamoto published the article "bitcoin: a peer-to-peer e-cash system", which described the P2P network technology, encryption technology, time stamp technology, and other technologies Blockchain technology and other e-cash system architecture concept, which marks the birth of bitcoin
two months later, the theory came into practice, and the first bitcoin Genesis block with serial number 0 was born on January 3, 2009. A few days later, a block with serial number 1 appeared on January 9, 2009, and connected with the genesis block with serial number 0 to form a chain, marking the birth of the blockchain
in recent years, the world's attitude towards bitcoin has gone up and down, but blockchain technology, as one of the underlying technologies of bitcoin, has been paid more and more attention. In the process of bitcoin formation, blocks are storage units that record all the communication information of each block node in a certain period of time
each block is linked by random hash (also known as hash algorithm). The latter block contains the hash value of the previous block. With the expansion of information exchange, one block is connected with another block one after another, and the result is called blockchain [3].

2. Usually, when the factory purchases the injection molding machine, it selects the appropriate injection molding machine according to the weight of its proct. However, many people do not understand the theoretical injection volume, theoretical injection volume and actual injection volume provided by some injection molding machine manufacturers, Now, the calculation method of these data and the common sense of how to select the injection molding machine according to the plastic parts are introced as follows:
I. The theoretical injection volume and the theoretical injection volume are calculated according to the design value, and the formula is
v= π/ 4 DS2 * s (formula 1)
v-theoretical injection volume cm3
DS screw diameter cm
S-injection stroke cm
the theoretical injection volume is equal to the theoretical injection volume multiplied by the density of plastic at room temperature, i.e.
G = VX ρ Formula 2)
g-theoretical injection volume g
v-theoretical injection volume cm3
ρ- The density of PS at room temperature is 1.05g/cm3. For example, the 160F machine in the company's proct version has a theoretical injection volume of 307cm3 and a theoretical injection volume of 307cm3 × 1.05 = 322.4g

2. Actual injection volume and injection volume
the volume required for each injection is obtained by multiplying the weight of each cavity material by the number of cavities, adding the weight of gate and flow, and then dividing by the density of plastic at the mold temperature:
V = G/ ρ Fusion x η Formula 3)
v-theoretical glue injection volume cm3
g-actual maximum glue injection volume g
ρ- The density of plastics at molding temperature g / cm3
η- The efficiency safety factor of the rubber apron
includes a safety factor considering the backflow of the plastic melt before the closure of the rubber apron and with the gap between the rubber apron and the barrel ring the injection process η For most plastics, η It's 0.97, right η 95
at present, the injection volume and injection volume indicated in the samples of F3, f3j, PVC, pet series procts of the company are obtained according to the above formula and polystyrene density standard. For example: 160f2 machine, injection volume v = 329cm3, PS melting temperature close to ρ Melt = 0.93g/cm3, ξ= 97, calculated by formula (3), the actual maximum injection amount is 296g
for polystyrene (PS), another empirical method to calculate the actual injection volume is to multiply the theoretical injection volume by a coefficient and then multiply by the density of polystyrene at room temperature:
G = v ×ρ×α
G - maximum actual injection volume g
V - Theoretical injection volume cm3
V ρ- PS density 1.05g/cm3 at room temperature
α- Coefficient
according to the national instry standard JB / t7267.94, α The value is 0.85

total weight = the weight of all parts + the weight of the flow channel. The injection quantity is the total weight, and the injection position is the injection quantity of the flow channel; The second injection position is the injection amount of 90% of the proct; The third segment is the injection amount of the last segment< The theoretical injection volume is calculated according to the design value, and the formula is
v= π/ 4 DS2 * s (formula 1)
v-theoretical injection volume cm3
DS screw diameter cm
S-injection stroke cm
the theoretical injection volume is equal to the theoretical injection volume multiplied by the density of plastic at room temperature, i.e.
G = VX ρ Formula 2)
g-theoretical injection volume g
v-theoretical injection volume cm3
ρ- The density of PS at room temperature is 1.05g/cm3< (2) actual injection volume and injection volume
the volume required for each injection is obtained by multiplying the weight of each cavity material by the number of cavities, adding the weight of gate and flow, and then dividing by the density of plastic at the mold temperature:
V = G/ ρ Fusion x η Formula 3)
v-theoretical glue injection volume cm3
g-actual maximum glue injection volume g
ρ- The density of plastics at molding temperature g / cm3
η- The efficiency safety factor of the rubber apron
includes a safety factor considering the backflow of the plastic melt before the closure of the rubber apron and with the gap between the rubber apron and the barrel ring the injection process η For most plastics, η It's 0.97, right η 95
for polystyrene (PS), another empirical method to calculate the actual injection volume is to multiply the theoretical injection volume by a coefficient and then multiply by the density of polystyrene at room temperature:
G = v ×ρ×α
G - maximum actual injection volume g
V - Theoretical injection volume cm3
V ρ- PS density 1.05g/cm3 at room temperature
α- Coefficient
according to the national instry standard JB / t7267.94, α The value is 0.85.

4.

bus line: Metro Line 1 → Metro Line 2, the whole journey is about 14.0km

1. Take Metro Line 1 from TIYU West Road, after 5 stops, to gongyuanqian station

2. Take Metro Line 2, after 7 stops, to Baiyun culture square station

5. There are Oriental theme post bars such as Oriental bar and Oriental project bar (basically every cm game, and there are many Chinese games, and there are concentrated posts)

thbwiki, which can be used to find information
there are Oriental thematic forums such as Miaoyu hall, fishing ground, Oriental Town and Oriental Fantasy Town, and new games or Chinese characters are generally released in these forums
the original Oriental game is also a peer game, which can be downloaded from the above recommended places.

6.

bus line: No.46 → Metro Line 2, the whole journey is about 15.1km

1. Take No.46 from Tianhe passenger station, pass 16 stops, and reach Yaotai station

2. Walk about 300m to Sanyuanli station

3. Take Metro Line 2, pass 3 stops, and reach Baiyun Culture Square Station

please take it, thank you

7. Take Guangfo line to Xilang, turn to line 1 to park, then turn to line 2 to Baiyun culture square station.

8.

driving route: the whole journey is about 340 meters

starting point: Baiyun culture square

1. Starting from the starting point, drive 340 meters along Yuncheng No.2 road to the terminal point

ending point: Baiyun culture square

9.

bus line: Guangfo line → Metro Line 1 → Metro Line 2, the whole journey is about 33.1km

1. Walk about 10m from zumiao station to zumiao station

2. Take Guangfo line, pass 10 stations to Xilang station

3. Take Metro Line 1, pass 8 stations to gongyuanqian station

4. Take Metro Line 2, pass 7 stations to Baiyun Culture Square Station

5 Walk about 40 meters to Baiyun culture square

10. Where can I get on the bus? If you take the subway, you can buy a one-way ticket for Baiyun Culture Square Station of line 2 from any station of Guangzhou subway. The specific price is calculated from the subway station where you get on the train. After arriving at the station, ask the station staff to arrive.